networkd: add possibility to specify MulticastIGMPVersion

1 files changed, 21 insertions, 0 deletions

diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 6523c944ef..5090d3fb63 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -1005,6 +1005,27 @@ DuplicateAddressDetection=none</programlisting></para>
       </varlistentry>
 
       <varlistentry>
+        <term><varname>MulticastIGMPVersion=</varname></term>
+        <listitem>
+          <para>Configures IPv4 Multicast IGMP Version to be used, and controls the value of
+          <filename>/proc/sys/net/ipv4/conf/<replaceable>INTERFACE</replaceable>/force_igmp_version</filename>.
+          Takes one of <literal>no</literal>,
+          <literal>v1</literal>, <literal>v2</literal>, or <literal>v3</literal>.
+          When <literal>no</literal>, no enforcement of an IGMP version will be applied, IGMPv1/v2 fallback are allowed, will back to
+          IGMPv3 mode again if all IGMPv1/v2 Querier Present timer expire.
+          When <literal>v1</literal>, use of IGMP version 1 will be enforced, and IGMPv1 report will be replied even if IGMPv2/v3
+          queries are received.
+          When <literal>v2</literal>, use of IGMP version 2 will be enforced, and IGMPv2 report will be replied if an IGMPv2/v3 query
+          is received, but fallback to IGMPv1 if an IGMPv1 query is received.
+          When <literal>v3</literal>, use of IGMP version 3 will be enforced, and the same reaction will be done as <literal>no</literal>.
+          Defaults to unset, and the sysctl value will be unchanged.
+          </para>
+
+          <xi:include href="version-info.xml" xpointer="v257"/>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
         <term><varname>IPv4AcceptLocal=</varname></term>
         <listitem>
           <para>Takes a boolean. Accept packets with local source addresses. In combination with